/* General Page Styles */

* {
    box-sizing: border-box;
}

body {
    background-color: #e8edf2;
    color: #333333;
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* Header */

header {
    background-color: #173d5c;
    color: white;
    text-align: center;
    padding: 25px;
}

header h1 {
    margin: 0;
    font-size: 2em;
}

header p {
    margin: 5px;
}

/* Nav */

nav {
    background-color: #315c7c;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav li {
    margin: 0;
}

nav a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 15px 25px;
}

nav a:hover {
    background-color: #102d45;
    color: white;
    transition: background-color 0.3s;
}

/* Main Content */

main {
    background-color: white;
    max-width: 1000px;
    margin: 20px auto;
    padding: 25px;
}

section {
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid #cccccc;
}

h2 {
    color: #173d5c;
    border-bottom: 2px solid #315c7c;
    padding-bottom: 5px;
}

h3 {
    color: #315c7c;
}

p {
    margin-bottom: 15px;
}

/* Images */

.main-image {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 20px auto;
    border: 3px solid #315c7c;
    border-radius: 5px;
}

/* Columns */

.columns {
    display: flex;
    gap: 20px;
}

.columns div {
    flex: 1;
    background-color: #e8edf2;
    padding: 15px;
    border: 1px solid #cccccc;
}

/* Lists */

main ul, main ol {
    padding-left: 30px;
}

main li {
    margin-bottom: 8px;
}

/* Tables */

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th, td {
    border: 1px solid #777777;
    padding: 12px;
    text-align: left;
}

th {
    background-color: #315c7c;
    color: white;
}

tr:nth-child(even) {
    background-color: #e8edf2;
}

/* Contact us */

form {
    background-color: #f4f6f8;
    padding: 20px;
    border: 1px solid #cccccc;
}

fieldset {
    border: 1px solid #315c7c;
    margin-bottom: 20px;
    padding: 15px;
    min-width: 0;
}

legend {
    color: #173d5c;
    font-weight: bold;
}

form label {
    display: block;
    margin-top: 12px;
    margin-bottom: 5px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #999999;
    border-radius: 4px;
    font-family: Arial, Helvetica, sans-serif;
}

textarea {
    max-width: 100%;
}

input[type="radio"] {
    margin-left: 10px;
}

input[type="radio"] + label {
    display: inline-block;
    margin-right: 15px;
}

input[type="submit"],
input[type="reset"] {
    background-color: #315c7c;
    color: white;
    border: none;
    padding: 12px 20px;
    margin: 5px;
    cursor: pointer;
}

input[type="submit"]:hover,
input[type="reset"]:hover {
    background-color: #102d45;
}

/* Footer */

footer {
    background-color: #173d5c;
    color: white;
    text-align: center;
    padding: 15px;
}

footer p {
    margin: 0;
}

/* Mobile */

@media screen and (max-width: 600px) {

    header h1 {
        font-size: 1.5em;
    }

    nav ul {
        flex-direction: column;
    }

    nav a {
        text-align: center;
        padding: 10px;
    }

    main {
        margin: 10px;
        padding: 15px;
    }

    .columns {
        flex-direction: column;
    }

    form {
        padding: 10px;
    }

    th, td {
        padding: 8px;
    }
}